MC 5.X on Unity 4.1.5

We need to upgrade our editing suites (running MC 3.5) to MC5.5.X due to new workflow with SONY EX 3 new cameras. I can get a new QLOGIC 4GB switcher and new ATTO Celerity 4GB boards but I cannot change the old MediArrayLX to LP's. Also I would find rather difficult to find a Recovery CD for Unity File Manager with WIndows XP to be able to upgrade FM to MN4.2.4.